This paper presents details of a flutter and stability analysis of aerospace structures such as hypersonic vehicles. Both structural and aerodynamic domains are discretized by the common finite element technique. A vibration analysis is first performed by the STARS code employing a block Lanczos solution scheme. This is followed by the generation of a linear aerodynamic grid for subsequent linear flutter analysis within subsonic and supersonic regimes of the flight envelope; the doublet lattice and constant pressure techniques are employed to generate the unsteady aerodynamic forces. Flutter analysis is then performed for several representative flight points. The nonlinear flutter solution is effected by first implementing a CFD solution of the entire vehicle. Thus, a 3-D unstructured grid for the entire flow domain is generated by a moving front technique. A finite element Euler solution is then implemented employing a quasi-implicit as well as an explicit solution scheme. A novel multidisciplinary analysis is next effected that employs modal and aerodynamic data to yield aerodynamic damping characteristics. Such analyses are performed for a number of flight points to yield a large set of pertinent data that define flight flutter characteristics of the vehicle. This paper outlines the finite-element-based integrated analysis procedures in detail, which is followed by the results of numerical analyses of flight flutter simulation.


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    Title :

    Multidisciplinary aeroelastic analysis of a generic hypersonic vehicle


    Contributors:

    Conference:

    AIAA International Aerospace Planes Conference ; 1993 ; Munich, Germany


    Publication date :

    1993-10-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Multidisciplinary Aeroelastic Analysis of a Generic Hypersonic Vehicle

    Gupta, K. / Petersen, K. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 1993




    Aeroelastic Analysis of a Trimmed Generic Hypersonic Vehicle

    Nydick, I. / Friedmann, P. / AIAA et al. | British Library Conference Proceedings | 1996